Persist的同源词
* prostitute
n. 娼妓，妓女
* prostitution
n. 卖淫
Prostitution is on the increase in the city.
城里卖淫活动越来越多.
* superstitious
a. 迷信
a superstitious woman
一个迷信的女人

* superstition
n. 迷信
the old superstition that walking under a ladder is unlucky
认为从梯子下走过不吉利的古老迷信说法
* persevere
v. 锲而不舍，坚持不懈（褒义）
It can be tricky at first, but persevere.
一开始会有些困难，不过要坚持。